{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:A2O4VM5D7L26IZMOWK2BP67QZY","short_pith_number":"pith:A2O4VM5D","canonical_record":{"source":{"id":"1304.5970","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-04-22T14:48:58Z","cross_cats_sorted":[],"title_canon_sha256":"420e4b1c5962ff32958ebc2a44083ed6fa6295d3d529d804f47e22320aaeaf03","abstract_canon_sha256":"3d71643624548ab654a478cde6fb9d739a0b59d85a056e8b7015c13bb88882b7"},"schema_version":"1.0"},"canonical_sha256":"069dcab3a3faf5e4658eb2b417fbf0ce1f1fcb7175b31c8361d816d2362079fa","source":{"kind":"arxiv","id":"1304.5970","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.5970","created_at":"2026-05-18T03:27:23Z"},{"alias_kind":"arxiv_version","alias_value":"1304.5970v1","created_at":"2026-05-18T03:27:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.5970","created_at":"2026-05-18T03:27:23Z"},{"alias_kind":"pith_short_12","alias_value":"A2O4VM5D7L26","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"A2O4VM5D7L26IZMO","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"A2O4VM5D","created_at":"2026-05-18T12:27:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:A2O4VM5D7L26IZMOWK2BP67QZY","target":"record","payload":{"canonical_record":{"source":{"id":"1304.5970","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-04-22T14:48:58Z","cross_cats_sorted":[],"title_canon_sha256":"420e4b1c5962ff32958ebc2a44083ed6fa6295d3d529d804f47e22320aaeaf03","abstract_canon_sha256":"3d71643624548ab654a478cde6fb9d739a0b59d85a056e8b7015c13bb88882b7"},"schema_version":"1.0"},"canonical_sha256":"069dcab3a3faf5e4658eb2b417fbf0ce1f1fcb7175b31c8361d816d2362079fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:27:23.639553Z","signature_b64":"hK2ERh0tZfESL5NTL3pmiwXc4CzwSbI9u+1b2DvC4+byKtqu1pxhzV30BI5vvhnUxxJqtqxKJvIkiFl12prADw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"069dcab3a3faf5e4658eb2b417fbf0ce1f1fcb7175b31c8361d816d2362079fa","last_reissued_at":"2026-05-18T03:27:23.638880Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:27:23.638880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.5970","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:27:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0tIJo3QZafJrRKtdcJlF4KDpUhNoZW5QEiUyKUe0heRsvCl7I59PccJauNsYX4+4GF/j+B+Tc4KcgPd6xkXlDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T05:43:06.304660Z"},"content_sha256":"e014962c64b3ec8b7dcaa97b844792969d2474e94741be1f0685f968f40388d2","schema_version":"1.0","event_id":"sha256:e014962c64b3ec8b7dcaa97b844792969d2474e94741be1f0685f968f40388d2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:A2O4VM5D7L26IZMOWK2BP67QZY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Three Generalizations of the FOCUS Constraint","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.AI","authors_text":"Mohamed Siala, Nina Narodytska, Thierry Petit, Toby Walsh","submitted_at":"2013-04-22T14:48:58Z","abstract_excerpt":"The FOCUS constraint expresses the notion that solutions are concentrated. In practice, this constraint suffers from the rigidity of its semantics. To tackle this issue, we propose three generalizations of the FOCUS constraint. We provide for each one a complete filtering algorithm as well as discussing decompositions."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.5970","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:27:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a32ZMtN8MxrYmpxC3KENO/uiibRfFIEsH23olImNdwU8P/yWzHkZIql0dR/bJKaFlYvu1RGEfOaNIU6RIZqNAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T05:43:06.305004Z"},"content_sha256":"ba3623ba3b1ff713adcc12208042f546c685443db78a705c55da021c7613a3a9","schema_version":"1.0","event_id":"sha256:ba3623ba3b1ff713adcc12208042f546c685443db78a705c55da021c7613a3a9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A2O4VM5D7L26IZMOWK2BP67QZY/bundle.json","state_url":"https://pith.science/pith/A2O4VM5D7L26IZMOWK2BP67QZY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A2O4VM5D7L26IZMOWK2BP67QZY/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T05:43:06Z","links":{"resolver":"https://pith.science/pith/A2O4VM5D7L26IZMOWK2BP67QZY","bundle":"https://pith.science/pith/A2O4VM5D7L26IZMOWK2BP67QZY/bundle.json","state":"https://pith.science/pith/A2O4VM5D7L26IZMOWK2BP67QZY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A2O4VM5D7L26IZMOWK2BP67QZY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:A2O4VM5D7L26IZMOWK2BP67QZY","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"3d71643624548ab654a478cde6fb9d739a0b59d85a056e8b7015c13bb88882b7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-04-22T14:48:58Z","title_canon_sha256":"420e4b1c5962ff32958ebc2a44083ed6fa6295d3d529d804f47e22320aaeaf03"},"schema_version":"1.0","source":{"id":"1304.5970","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.5970","created_at":"2026-05-18T03:27:23Z"},{"alias_kind":"arxiv_version","alias_value":"1304.5970v1","created_at":"2026-05-18T03:27:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.5970","created_at":"2026-05-18T03:27:23Z"},{"alias_kind":"pith_short_12","alias_value":"A2O4VM5D7L26","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"A2O4VM5D7L26IZMO","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"A2O4VM5D","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:ba3623ba3b1ff713adcc12208042f546c685443db78a705c55da021c7613a3a9","target":"graph","created_at":"2026-05-18T03:27:23Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The FOCUS constraint expresses the notion that solutions are concentrated. In practice, this constraint suffers from the rigidity of its semantics. To tackle this issue, we propose three generalizations of the FOCUS constraint. We provide for each one a complete filtering algorithm as well as discussing decompositions.","authors_text":"Mohamed Siala, Nina Narodytska, Thierry Petit, Toby Walsh","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-04-22T14:48:58Z","title":"Three Generalizations of the FOCUS Constraint"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.5970","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:e014962c64b3ec8b7dcaa97b844792969d2474e94741be1f0685f968f40388d2","target":"record","created_at":"2026-05-18T03:27:23Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"3d71643624548ab654a478cde6fb9d739a0b59d85a056e8b7015c13bb88882b7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-04-22T14:48:58Z","title_canon_sha256":"420e4b1c5962ff32958ebc2a44083ed6fa6295d3d529d804f47e22320aaeaf03"},"schema_version":"1.0","source":{"id":"1304.5970","kind":"arxiv","version":1}},"canonical_sha256":"069dcab3a3faf5e4658eb2b417fbf0ce1f1fcb7175b31c8361d816d2362079fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"069dcab3a3faf5e4658eb2b417fbf0ce1f1fcb7175b31c8361d816d2362079fa","first_computed_at":"2026-05-18T03:27:23.638880Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:27:23.638880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hK2ERh0tZfESL5NTL3pmiwXc4CzwSbI9u+1b2DvC4+byKtqu1pxhzV30BI5vvhnUxxJqtqxKJvIkiFl12prADw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:27:23.639553Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.5970","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e014962c64b3ec8b7dcaa97b844792969d2474e94741be1f0685f968f40388d2","sha256:ba3623ba3b1ff713adcc12208042f546c685443db78a705c55da021c7613a3a9"],"state_sha256":"a6ec45585811b234e284f78634a4dcd1c65683972e703333a646a8331996191a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tTL7VfLre2QsPBDeUaZK/5tQjIOehFJGALlJhV1isuFwvIbFvMnEc+VhXLQ4REc7ozGFTOanlYkXJxPoSS8DDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T05:43:06.307061Z","bundle_sha256":"94235519e24c4fa9fff555dacb3349a8e2b9631d0bfb071b01ea5c0ada380698"}}